[Ardamir the Blessed]

'The Shibboleth of Fëanor', note 53:

When Aragorn, descended in long line from Elros, wedded Arwen in the third union of Men and Elves, the lines of all the Three Kings of the High Elves (Eldar), Ingwë, Finwë, and Olwe and Elwë were united and alone preserved in Middle-earth.

[As is said in the text at this point Arwen was descended from Finwë both in the line of Fingolfin (through Elrond) and in the line of Finarfin (through Celebrían); but she was also descended from Elwë (Thingol) through Elrond's mother Elwing, and through Galadriel's mother Eärwen from Olwë of Alqualondë. She was not directly descended from Ingwë, but her fore-mother Indis was (in earlier texts) the sister of Ingwë (X.261-2, etc.), or (in the present work, p. 343) the daughter of his sister. It is hard to know what my father had in mind when he wrote the opening of this note.]